Asked about his relationship with Li-Lo, Avi told E! news: "She's really awesome, and she's a lot of fun. I would definitely call her one of our biggest supporters."

Lindsay, 26, posted a picture of herself posing with a guitar, which she implied belonged to Avi, writing: "Nice @yamahaguitarsus @cityof_thesun."

She has now set the photo as her profile picture on Twitter.

As well as being part of the band, Avi is also a nightclub promoter in New York. Lindsay was last linked to The Wanted's Max George who described her as "a groupie".

Lindsay has been ordered to spend 90 days in rehab in order to avoid a jail sentence after pleading no contest to charges of reckless driving, lying to police and breaching the terms of her probation, over a car crash she was involved in last June. She was given 45 days to find a suitable facility.

In the meantime she has been filming a guest appearance on Charlie Sheen's show Anger Management, playing his characters jailbird love interest.

She tweeted: "I just had such a wonderful day on set of #angermanagement with @charliesheen".

Lindsay also denied reports she had been pictured leaving a nightclub hiding in the back of a car under a blanket, just after her latest court hearing.